Notes On The Metallography Of Refined Copper. (fc12207e-5eec-40a1-aef7-ab87716b1f76)
- Organization:
- The American Institute of Mining, Metallurgical, and Petroleum Engineers
- Pages:
- 2
- File Size:
- 119 KB
- Publication Date:
- Jan 11, 1913
Abstract
Discussion of the paper of Earl S. Bardwell, presented at the Butte meeting, August, 1913, and printed in Bulletin No. 79, July, 1913, pp. .1429 to 1441. H. O. HOFMAN, Boston, Mass. (communication to the Secretary*) :-It is pleasing to the originators of the planimetric determination of oxygen in refined copper to see that the method has been taken up by a large smelting plant to be used in every-day work after it has been simplified to suit the new conditions. Several years ago Huntington and Desch 1 had improved our mode of working. They projected the developed negative on to a screen, traced the outlines of the picture with a pencil, drew a border, and measured one constituent with. the planimeter. In order to give the work greater precision, they divided the area into squares of 1 cm. side, shaded the
Citation
APA: (1913) Notes On The Metallography Of Refined Copper. (fc12207e-5eec-40a1-aef7-ab87716b1f76)
MLA: Notes On The Metallography Of Refined Copper. (fc12207e-5eec-40a1-aef7-ab87716b1f76). The American Institute of Mining, Metallurgical, and Petroleum Engineers, 1913.